† improˈlific,a.Obs. [f. im-2 + prolific.] Not prolific; unprolific. a1661Fuller Worthies, Hartfordsh. ii. (1662) 22 Many Worthies, who are..either improlifick, or have Children in genitorum vituperium.1686Plot Staffordsh. 234 Imperfect, improlific eggs, which will never produce Chicken.